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6381195ad7
linux/drivers/acpi
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Rafael J. Wysocki 6381195ad7 ACPI: power: Rework turning off unused power resources 
Make turning off unused power resources (after the enumeration of
devices and during system-wide resume from S3) more straightforward
by using the observation that the power resource state stored in
struct acpi_power_resource can be used to determine whether or not
the give power resource has any users.

Namely, when the state of the power resource is unknown, its _STA
method has never been evaluated (or the evaluation of it has failed)
and its _ON and _OFF methods have never been executed (or they have
failed to execute), so for all practical purposes it can be assumed
to have no users (or to be unusable).  Therefore, instead of checking
the number of power resource users, it is sufficient to check if its
state is known.

Moreover, if the last known state of a given power resource is "off",
it is not necessary to turn it off, because it has been used to
initialize the power state or the wakeup power resources list of at
least one device and either its _STA method has returned 0 ("off"),
or its _OFF method has been successfully executed already.

Accordingly, modify acpi_turn_off_unused_power_resources() to do the
above checks (which are suitable for both uses of it) instead of
using the number of power resource users or evaluating its _STA
method, drop its argument (which is not useful any more) and update
its callers.

Also drop the users field from struct acpi_power_resource as it is
not useful any more.

Tested-by: Dave Olsthoorn <dave@bewaar.me>
Tested-by: Shujun Wang <wsj20369@163.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-05-31 13:59:02 +02:00
..
acpica ACPICA: ACPI 6.4: add CSI2Bus resource template 2021-04-07 19:09:01 +02:00
apei Merge branch 'acpi-misc' 2021-04-26 17:04:41 +02:00
arm64 Assorted arm64 fixes and clean-ups, the most important: 2021-05-07 12:11:05 -07:00
dptf ACPI: DPTF: Support Alder Lake 2020-11-10 18:52:51 +01:00
nfit ACPI: NFIT: Fix support for variable 'SPA' structure size 2021-05-12 12:38:25 -07:00
numa CFI on arm64 series for v5.13-rc1 2021-04-27 10:16:46 -07:00
pmic ACPI: fix various typos in comments 2021-03-19 17:45:49 +01:00
x86 ACPI: PM: s2idle: Add missing LPS0 functions for AMD 2021-05-17 16:22:48 +02:00
ac.c ACPI: AC: fix some coding style issues 2021-04-08 16:17:32 +02:00
acpi_adxl.c
acpi_amba.c Merge 5.2-rc6 into char-misc-next 2019-06-23 09:23:33 +02:00
acpi_apd.c ACPI: APD: fix a block comment align issue 2021-04-08 16:27:02 +02:00
acpi_cmos_rtc.c ACPI: cmos_rtc: Remove leftover ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_configfs.c ACPI: configfs: add missing check after configfs_register_default_group() 2021-01-22 16:35:34 +01:00
acpi_dbg.c ACPI: debug: Remove the not used function 2020-11-17 18:12:34 +01:00
acpi_extlog.c ACPI / extlog: Check for RDMSR failure 2020-10-02 19:01:55 +02:00
acpi_fpdt.c ACPI: tables: introduce support for FPDT table 2021-01-29 19:24:13 +01:00
acpi_ipmi.c ACPI: ipmi: remove useless return statement for void function 2021-04-08 16:27:02 +02:00
acpi_lpat.c
acpi_lpit.c ACPI: LPIT: Put the low power idle table after using it 2020-05-09 11:29:16 +02:00
acpi_lpss.c ACPI: LPSS: add a missed blank line after declarations 2021-04-08 16:27:02 +02:00
acpi_memhotplug.c acpi,memhotplug: enable MHP_MEMMAP_ON_MEMORY when supported 2021-05-05 11:27:27 -07:00
acpi_pad.c ACPI: acpi_pad: add a missed blank line after declarations 2021-04-08 16:27:02 +02:00
acpi_platform.c ACPI: platform: Remove ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_pnp.c ACPI: PNP: compare the string length in the matching_id() 2020-12-15 19:30:49 +01:00
acpi_processor.c Merge branch 'acpi-misc' 2021-04-26 17:04:41 +02:00
acpi_tad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
acpi_video.c Merge branch 'acpi-misc' 2021-04-26 17:04:41 +02:00
acpi_watchdog.c ACPI: watchdog: Replace open coded variant of resource_union() 2020-11-17 18:06:29 +01:00
battery.c ACPI: battery: fix some coding style issues 2021-04-08 16:27:02 +02:00
bgrt.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
blacklist.c ACPI: blacklist: fix clang warning for unused DMI table 2019-07-11 22:45:00 +02:00
bus.c ACPI updates for 5.12-rc1 2021-02-20 21:50:59 -08:00
button.c ACPI: button: fix some coding style issues 2021-04-08 16:27:02 +02:00
container.c ACPI: container: Remove leftover ACPICA debug functionality 2020-09-25 18:25:51 +02:00
cppc_acpi.c Merge branch 'acpi-misc' 2021-04-26 17:04:41 +02:00
custom_method.c ACPI: custom_method: fix a possible memory leak 2021-04-28 19:17:54 +02:00
debugfs.c ACPI: debugfs: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
device_pm.c ACPI: PM / fan: Put fan device IDs into separate header file 2021-05-21 19:02:35 +02:00
device_sysfs.c Merge branch 'acpi-misc' 2021-04-26 17:04:41 +02:00
dock.c ACPI: dock: fix some coding style issues 2021-04-08 16:27:03 +02:00
ec_sys.c
ec.c ACPI: EC: Clean up status flags checks in advance_transaction() 2020-11-23 20:01:01 +01:00
event.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
evged.c ACPI: GED: fix -Wformat 2020-11-09 19:25:20 +01:00
fan.c ACPI: PM / fan: Put fan device IDs into separate header file 2021-05-21 19:02:35 +02:00
fan.h ACPI: PM / fan: Put fan device IDs into separate header file 2021-05-21 19:02:35 +02:00
glue.c ACPI: bus: Introduce acpi_dev_get() and reuse it in ACPI code 2021-04-13 15:41:11 +02:00
hed.c ACPI: HED: Drop unused ACPI_MODULE_NAME() definition 2021-03-08 16:51:48 +01:00
internal.h ACPI: power: Rework turning off unused power resources 2021-05-31 13:59:02 +02:00
ioapic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq.c ACPI: irq: Prevent unregistering of GIC SGIs 2021-04-23 18:00:52 +01:00
Kconfig Merge branch 'acpi-tables' 2021-02-25 18:57:40 +01:00
Makefile Merge branch 'acpi-tables' 2021-02-25 18:57:40 +01:00
nvs.c
osi.c ACPI: OSI: Shoot duplicate word 2019-11-13 11:12:08 +01:00
osl.c ACPI: OSL: Clean up printing messages 2021-02-10 19:09:43 +01:00
pci_irq.c ACPI: PCI: IRQ: Consolidate printing diagnostic messages 2021-03-08 16:51:08 +01:00
pci_link.c ACPI: utils: Introduce acpi_evaluation_failure_warn() 2021-03-08 19:10:30 +01:00
pci_mcfg.c PCI: tegra: Add Tegra194 MCFG quirks for ECAM errata 2021-04-16 11:34:17 -05:00
pci_root.c PCI/ACPI: Clarify message about _OSC failure 2021-01-27 09:38:36 -06:00
pci_slot.c ACPI: PCI: Remove unused ACPICA debug code 2020-09-25 18:25:51 +02:00
platform_profile.c ACPI: platform: Add balanced-performance platform profile 2021-02-24 14:52:41 +01:00
power.c ACPI: power: Rework turning off unused power resources 2021-05-31 13:59:02 +02:00
pptt.c ACPI: PPTT: Consistently use unsigned int as parameter type 2020-01-07 11:46:36 +01:00
proc.c ACPI: proc: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_core.c ACPI: processor: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_driver.c ACPI: processor: Get rid of ACPICA message printing 2021-03-08 16:51:19 +01:00
processor_idle.c Merge branches 'acpi-pci' and 'acpi-processor' 2021-04-26 17:03:05 +02:00
processor_pdc.c ACPI: processor: Get rid of ACPICA message printing 2021-03-08 16:51:19 +01:00
processor_perflib.c Merge branch 'acpi-misc' 2021-04-26 17:04:41 +02:00
processor_thermal.c ACPI: processor: Remove the duplicated ACPI_PROCESSOR_CLASS macro 2020-11-17 18:12:34 +01:00
processor_throttling.c ACPI: utils: Introduce acpi_evaluation_failure_warn() 2021-03-08 19:10:30 +01:00
property.c ACPI: property: Satisfy kernel doc validator (part 2) 2021-02-12 15:34:14 +01:00
reboot.c ACPI: reboot: Avoid racing after writing to ACPI RESET_REG 2020-10-16 18:04:52 +02:00
resource.c ACPI: fix various typos in comments 2021-03-19 17:45:49 +01:00
sbs.c ACPI: SBS: Simplify the code using module_acpi_driver() 2020-11-17 18:12:34 +01:00
sbshc.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
sbshc.h ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
scan.c ACPI: power: Rework turning off unused power resources 2021-05-31 13:59:02 +02:00
sleep.c ACPI: power: Rework turning off unused power resources 2021-05-31 13:59:02 +02:00
sleep.h Revert "Revert "ACPI: scan: Turn off unused power resources during initialization"" 2021-05-10 14:02:17 +02:00
spcr.c ACPI: Use fallthrough pseudo-keyword 2020-07-09 14:09:28 +02:00
sysfs.c Merge branches 'acpi-pci' and 'acpi-processor' 2021-04-26 17:03:05 +02:00
tables.c ACPI: tables: x86: Reserve memory occupied by ACPI tables 2021-03-29 19:26:04 +02:00
thermal.c - Use the newly introduced 'hot' and 'critical' ops for the acpi 2021-02-22 09:39:11 -08:00
tiny-power-button.c ACPI: tiny-power-button: Simplify the code using module_acpi_driver() 2020-11-17 18:12:34 +01:00
utils.c Merge branches 'acpi-cppc', 'acpi-video' and 'acpi-utils' 2021-04-26 17:04:27 +02:00
video_detect.c ACPI: video: use native backlight for GA401/GA502/GA503 2021-04-21 18:54:41 +02:00
wakeup.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00